Use of a fluorescent brightener to improve Pseudoplusia includens (Lepidoptera: Noctuidae) nuclear polyhedrosis virus activity in the laboratory and field

A fluorescent brightener, Calcofluor white M2R, was studied for enhancement of Pseudoplusia includens (Walker), soybean looper, nuclear polyhedrosis virus (PiNPV) activity against P. includens larvae on semisynthetic diet, cotton, and soybean leaves and in field tests on soybean. Addition of 0.1% br...

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Bibliographic Details
Published in:Journal of economic entomology 1996-02, Vol.89 (1), p.92-96
Main Authors: Zou, Y. (University of Arkansas, Fayetteville, AR.), Young, S.Y
Format: Article
Language:English
Subjects:
ADJUVANT
ARKANSAS
Biological and medical sciences
Biological control
CHRYSODEIXIS
COADYUVANTES
Control
CONTROL DE INSECTOS
Fundamental and applied biological sciences. Psychology
GLYCINE MAX
GOSSYPIUM HIRSUTUM
INSECTICIDAS
INSECTICIDE
LARVAS
LARVE
Lepidoptera
LUTTE ANTIINSECTE
MORTALIDAD
MORTALITE
Noctuidae
nuclear polyhedrosis virus
PESTICIDE MICROBIEN
Phytopathology. Animal pests. Plant and forest protection
PLAGUICIDAS MICROBIANOS
Protozoa. Invertebrates
Pseudoplusia includens
SINERGISMO DE LOS PLAGUICIDAS
SYNERGISTE DE PESTICIDES
TOXICIDAD
TOXICITE
VIRUS DE INVERTEBRADOS
VIRUS DES INVERTEBRES
VIRUS POLIEDROSIS NUCLEAR
VIRUS POLYEDROSE NUCLEAIRE
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Description
Summary:A fluorescent brightener, Calcofluor white M2R, was studied for enhancement of Pseudoplusia includens (Walker), soybean looper, nuclear polyhedrosis virus (PiNPV) activity against P. includens larvae on semisynthetic diet, cotton, and soybean leaves and in field tests on soybean. Addition of 0.1% brightener to the PiNPV suspension on semisynthetic diet reduced the LC50 from 970 polyhedral inclusion bodies (PIB)/mm2 to 0.0625 PIB/mm2 for 2nd instars. The brightener (0.08%) reduced the LT50 of PiNPV from 15.9 to 6.4 d. In a spray-table test, percentage mortality from virus of 2nd instars fed cotton leaves sprayed with 1 X 10(6) PIB/ml of PiNPV alone was significantly increased with the addition of 0.1% (soybean leaves only) and 1% brightener (cotton and soybean leaves). In a field test on artificially infested soybean plants, mortality from virus of 2nd to 4th instars was significantly increased by addition of 0.1% and 1.0% brightener. A field test on a natural population of P. includens larvae of mixed ages showed that 0.3% and 1.0% brightener significantly enhanced mortality from virus of PiNPV-treated larvae. All tests demonstrated that a fluorescent brightener enhanced activity of PiNPV
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/89.1.92